Chemistry of C3 and carbon chain molecules in DR21(OH)

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Table 1

Properties of the sources in DR21(OH).

Component	α(2000)	β(2000)	v _LSR	Mass^a	T _d	N(H₂)^b	⟨ n(H₂) ⟩	References
			(km s^-1)	(M_⊙)		(10²³cm^-2)	(10⁷ cm^-3)

MM1	20^h39^m010	4222′48″	−4.1 ± 0.3	88	58	4.5	4.1	1, 2
MM2	20^h39^m004	4222′438	−0.7 ± 0.3	143	30	7.4	6.8	1, 2
Envelope	...	...	−3.1 ± 0.3	118^c		3.5	0.3	1, 3, 4

Notes.

^(a)

All estimated for a distance of 1.5 kpc.

^(b)

Within a 15″ beam.

^(c)

Mass of the envelope derived by removing the contributions of MM1 and MM2 from the total mass of the region estimated by Motte et al. (2007).

References. (1) Mangum et al. (1991); (2) Mangum et al. (1992); (3) Wilson & Mauersberger (1990); (4) Motte et al. (2007).

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